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3. Measurement of the neutron flux of CSNS Back-n ES#1 under small collimators from 0.5 eV to 300 MeV

Author

Chen, Yonghao, Qiu, Yijia, Li, Qiang, Tang, Shengda, Yang, Yiwei, Ren, Zhizhou, Jiang, Wei, Fan, Ruirui, Yi, Han, Liu, Rong, Tang, Jingyu, Jing, Hantao, Lan, Changlin, Li, Yang, Tan, Zhixin, An, Qi, Bai, Jiangbo, Bao, Jie, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Zhen, Cui, Zengqi, Feng, Changqing, Gao, Keqing, Gao, Xiaolong, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Hu, Yiwei, Huang, Hanxiong, Huang, Xiru, Jiang, Haoyu, Jiang, Zhijie, Kang, Ling, Li, Bo, Li, Chao, Li, Jiawen, Li, Xiao, Liu, Jie, Liu, Shubin, Liu, Xingyan, Long, Ze, Luan, Guangyuan, Ning, Changjun, Niu, Mengchen, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Kang, Sun, Zhijia, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Zhaohui, Wen, Zhongwei, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Xiaoyun, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Linhao, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhou, Luping, Zhou, Zhihao, and Zhu, Kejun

Published
2024
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6. Determination of the 232Th(n,γ) cross section from 10 to 200 keV at the Back-n facility at CSNS

Author

Wang, Jincheng, Ren, Jie, Jiang, Wei, Ruan, Xichao, Sun, Qi, Hu, Jifeng, Jiang, Bing, Bao, Jie, Zhang, Qiwei, Luan, Guangyuan, Huang, Hanxiong, Nie, Yangbo, Ge, Zhigang, An, Qi, Bai, Haofan, Bai, Jiangbo, Cao, Ping, Chen, Qiping, Chen, Yonghao, Chen, Zhen, Cui, Zengqi, Fan, Anchuan, Fan, Ruirui, Feng, Changqing, Feng, Fanzhen, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Hu, Yiwei, Jia, Weihua, Jiang, Haoyu, Jiang, Zhijie, Jin, Zhengyao, Kang, Ling, Li, Bo, Li, Chao, Li, Gong, Li, Jiawen, Li, Qiang, Li, Yang, Liu, Jie, Liu, Rong, Liu, Shubin, Ning, Changjun, Qi, Binbin, Ren, Zhizhou, Song, Zhaohui, Sun, Kang, Tan, Zhixin, Tang, Jingyu, Tang, Shengda, Wang, Lijiao, Wang, Pengcheng, Wang, Zhaohui, Wen, Zhongwei, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yi, Han, Yu, Yongji, Zhang, Guohui, Zhang, Linhao, Zhang, Mohan, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Yue, Zhang, Zhiyong, Zhao, Maoyuan, Zhou, Luping, Zhu, Kejun, and Zhang, Jie

Published
2023
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8. Progress in measurements of fission cross sections and total cross sections at CSNS Back-n white neutron source

Author

Liu, Rong, Yang, Yiwei, Ren, Zhizhou, Wen, Zhongwei, Wen, Jie, Liu, Xingyan, Chen, Yonghao, Yi, Han, Han, Zijie, Chen, Qiping, Bao, Jie, An, Qi, Bai, Huaiyong, Cao, Ping, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Shubin, Luan, Guangyuan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2023
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10. Experimental studies on nuclide identification radiography with a CMOS camera at Back-n white neutron source

Author

Wang, Lijiao, Li, Qiang, Tang, Jingyu, Chen, Yonghao, Jing, Hantao, Tan, Zhixin, Tian, Binbin, Li, Gong, Jin, Zhengyao, Fan, Ruirui, Ning, Changjun, An, Qi, Bai, Haofan, Bai, Jiangbo, Bao, Jie, Cao, Ping, Chen, Qiping, Chen, Zhen, Cui, Zengqi, Fan, Anchuan, Feng, Changqing, Feng, Fanzhen, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Hu, Yiwei, Huang, Hanxiong, Jia, Weihua, Jiang, Haoyu, Jiang, Wei, Jiang, Zhijie, Kang, Ling, Li, Bo, Li, Chao, Li, Jiawen, Li, Xiao, Li, Yang, Liu, Jie, Liu, Rong, Liu, Shubin, Luan, Guangyuan, Qi, Binbin, Ren, Jie, Ren, Zhizhou, Ruan, Xichao, Song, Zhaohui, Sun, Kang, Tang, Shengda, Wang, Pengcheng, Wang, Zhaohui, Wen, Zhongwei, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yi, Han, Yu, Yongji, Zhang, Guohui, Zhang, Linhao, Zhang, Mohan, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yue, Zhang, Zhiyong, Zhao, Maoyuan, Zhou, Luping, Zhou, Zhihao, and Zhu, Kejun

Published
2023
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12. Measurement of the 236,238U(n,f) cross sections from the threshold to 200 MeV at CSNS Back-n

Author

Ren, Zhizhou, Yang, Yiwei, Liu, Rong, Ye, Bangjiao, Wen, Zhongwei, Wen, Jie, Guo, Hairui, Chen, Yonghao, Yi, Han, Sun, Weili, Yan, Jie, Han, Zijie, Liu, Xingyan, Chen, Qiping, Ye, Tao, Bai, Jiangbo, An, Qi, Bai, Huaiyong, Bao, Jie, Cao, Ping, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Li, Yang, Liu, Shubin, Luan, Guangyuan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2023
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13. Preparation of No-Carrier-Added 177Lu by DGA Resin Assisted Cyclic Elution

Author

ZHUO Liangang;YANG Yuchuan;YUE Haidong;XIONG Xiaoling;WANG Guanquan;WANG Hailin;YANG Lin;LIN Qingchuan;CHEN Qiping;TU Jun;WEI Hongyuan

Subjects
no-carrier-added 177lu, dga resin, medical isotopes, 177lu separations, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798
Abstract

A preparation process of No-Carrier-Added (NCA) 177Lu in China Mianyang Research Reactor (CMRR）was investigated. In this work, the key component of the process is DGA resin column which can adsorb Yb(Ⅲ) and Lu(Ⅲ) metal ions in the eluent was added to the purification process of 177Lu. The eluent “on-line” cyclic elution of lanthanide resin column was realized through special flow path connection. The tracer test showed that this technology can effectively reduce the volume of radioactive acid waste liquid generated from purification process of 177Lu. The technology was verified in three batches production, and the primary separation stage reduced the volume of waste liquid above 86%. The NCA 177Lu product prepared by cyclic elution process meets the quality requirements.

Published
2022
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15. Effect of Seedling Rates on Crop Yield and Methane Emissions from Rice Paddies.

Author

Chen, Qiping, Li, Hao, Huang, Hexian, and Wang, Wei

Subjects
*GREENHOUSE gas mitigation, *CROP yields, *GREENHOUSE plants, *AGRICULTURE, *GRAIN yields, *PADDY fields
Abstract

Agricultural strategies are urgently needed to mitigate greenhouse gas emissions without reducing crop yield. Seedling rate per hill will affect the quantity and quality of tillers, which may affect rice yield and CH4 emissions. Therefore, it is hypothesized that high yields with low yield-scaled CH4 emissions could be achieved with optimal seedling rate per hill. A field experiment was conducted with three densities (low seedling rate, LSR; moderate seedling rate, MSR; and high seedling rate, HSR) for two consecutive rice seasons. The CH4 fluxes were determined by the static chamber–GC method. The results showed no significant differences in rice yields, seasonal CH4 emissions, or yield-scaled CH4 emissions between the three treatments. For early rice, the HSR tended to achieve high yield without increasing yield-scaled CH4 emissions. As for late rice, the MSR showed similar rice yield, and tended to have lower yield-scaled CH4 emissions in comparison with the HSR. The results suggest that choosing an appropriate seedling rate per hill to increase grain yield while maintaining lower or comparable yield-scaled CH4 emissions can be a promising option to reduce CH4 emissions from rice paddies. [ABSTRACT FROM AUTHOR]

Published
2024
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17. Effects of Fallow Season Water and Straw Management on Methane Emissions and Associated Microorganisms.

Author

Wang, Wei, Chen, Qiping, Huang, Hexian, and Xie, Yonghong

Subjects
*RESTRICTION fragment length polymorphisms, *RICE straw, *WATER management, *POLYMERASE chain reaction, *WATER purification
Abstract

The effects of fallow season water and straw management on methane (CH4) emissions during the fallow season and the subsequent rice-growing season are rarely reported, and the underlying microbial mechanisms remain unclear. A field experiment was conducted with four treatments: (1) fields flooded in both the fallow and rice seasons (FF), (2) fields drained in the fallow season and flooded in the rice season (DF), (3) FF with straw retention (FFS), and (4) DF with straw retention (DFS). The CH4 emissions in fields under different water and straw treatments were monitored using the static closed chamber method. Methanogenic and methanotrophic communities in these fields were examined using terminal restriction fragment length polymorphism (T-RFLP) analysis based on the mcrA gene and pmoA gene encoding methyl coenzyme M reductase and particulate methane monooxygenase, respectively. The results showed that CH4 emissions were significantly affected by water management, straw retention, season, and their interactions. Over 80% of CH4 emissions occurred during the rice season. Field drainage during the fallow season reduced CH4 emissions by 47.0% and 53.8% with and without straw during the rice season, respectively. Water management altered the abundance and composition of methanogens and methanotrophs, whereas the effects of straw retention were less pronounced. The quantitative polymerase chain reaction (qPCR) assay revealed that field drainage in the fallow season decreased the mcrA gene abundance by 30.0% and 23.2% with and without straw in rice season, respectively, and increased the pmoA gene abundance by 108.9% and 213.7% with and without straw in rice season, respectively. CH4 flux was significantly positively associated with mcrA gene copy number and the ratio of mcrA to pmoA gene copy number, whereas it was significantly negatively correlated with the pmoA gene copy number. Results indicated that fallow drainage greatly decreased CH4 emission not only during the fallow season but also during the subsequent rice season by altering the community composition of methanogens and methanotrophs. These findings provide scientific insight into the role of water and straw management in controlling CH4 emissions through microbial community dynamics. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Background study for [formula omitted] cross section measurements with C[formula omitted]D[formula omitted] detectors at CSNS Back-n

Author

Ren, Jie, Ruan, Xichao, Jiang, Wei, Bao, Jie, Luan, Guangyuan, Zhang, Qiwei, Huang, Hanxiong, Nie, Yangbo, Ge, Zhigang, An, Qi, Bai, Huaiyong, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Yonghao, Chen, Yukai, Chen, Zhen, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Zhijie, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Chao, Li, Jiawen, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Mu, Qili, Ning, Changjun, Qi, Binbin, Ren, Zhizhou, Song, Yingpeng, Song, Zhaohui, Sun, Hong, Sun, Kang, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yi, Han, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Linhao, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yubin, Zhou, Luping, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2021
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23. Detection of low-energy charged-particle using the [formula omitted]E-E telescope at the Back-n white neutron source

Author

Fan, Ruirui, Jiang, Haoyu, Jiang, Wei, Zhang, Guohui, Yi, Han, Sun, Kang, Bai, Huaiyong, Zhou, Liang, Ning, Changjun, He, Yuefeng, Zhao, Yingtan, Wang, Yanfeng, He, Yongcheng, Cui, Zengqi, Sun, Zhijia, An, Qi, Bao, Jie, Cao, Ping, Chen, Qiping, Chen, Yonghao, Cheng, Pinjing, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Ma, Yinglin, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2020
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24. Neutron and [formula omitted] background measurements of the experimental halls at the CSNS back-streaming white neutron source

Author

Li, Qiang, Jing, Hantao, Zhou, Bin, Ning, Changjun, Tang, Jingyu, Ren, Jie, Yi, Han, Zhu, Xing, Zhang, Liying, Jiang, Wei, Fan, Ruirui, Bao, Jie, Feng, Changqing, Ruan, Xichao, Chen, Yonghao, Zhou, Luping, Li(a), Yang, Tan, Zhixin, Chen, Yukai, An, Qi, Bai, Huaiyong, Cao, Ping, Chen, Qiping, Cheng, Pinjing, Cui, Zengqi, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Xiao, Li(b), Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Ma, Yinglin, Qi, Binbin, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tang, Hongqing, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2020
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25. Application of a silicon detector array in [formula omitted] reaction cross-section measurements at the CSNS Back-n white neutron source

Author

Jiang, Wei, Bai, Huaiyong, Jiang, Haoyu, Yi, Han, Fan, Ruirui, Zhang, Guohui, Tang, Jingyu, Sun, Zhijia, Ning, Changjun, Sun, Kang, Gao, Keqing, Cui, Zengqi, An, Qi, Bao, Jie, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Yonghao, Chen, Yukai, Chen, Zhen, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Zhijie, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Chao, Li, Jiawen, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Mu, Qili, Qi, Binbin, Ren, Jie, Ren, Zhizhou, Ruan, Xichao, Song, Yingpeng, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Tan, Zhixin, Tang, Hongqing, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Linhao, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yubin, Zhou, Liang, Zhou, Luping, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2020
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26. Measurement of the U-238/U-235 fission cross section ratio at CSNS – Back-n WNS

Author

Wen, Jie, Yang, Yiwei, Wen, Zhongwei, Liu, Rong, Liu, Xingyan, Han, Zijie, Chen, Qiping, Ren, Zhizhou, An, Qi, Bai, Huaiyong, Bao, Jie, Cao, Ping, Chen, Yonghao, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Shubin, Luan, Guangyuan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yi, Han, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2020
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27. Measurement of the neutron beam profile of the Back-n white neutron facility at CSNS with a Micromegas detector

Author

Qi, Binbin, Li, Yang, Zhu, Danyang, Zhang, Zhiyong, Fan, Ruirui, Pan, Jiang, Feng, Jianxin, Liu, Chengming, Feng, Changqing, Liu, Jianbei, Shao, Ming, Zhou, Yi, Wang, Yanfeng, Yi, Han, An, Qi, Bai, Huaiyong, Bao, Jie, Cao, Ping, Chen, Qiping, Chen, Yonghao, Cheng, Pinjing, Cui, Zengqi, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Ma, Yinglin, Ning, Changjun, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingming, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Kejun, and Zhu, Peng

Published
2020
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28. Combined gamma-ray and energy-selective neutron radiography at CSNS

Author

Yan, Xiaosong, Yang, Yigang, Li, Qiang, Yang, Xin, Lu, Jian, Meng, Shijian, Tan, Zhixin, Yang, Yiwei, An, Qi, Bai, Huaiyong, Bao, Jie, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Yonghao, Chen, Yukai, Chen, Zhen, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Jiang, Zhijie, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Chao, Li, Jiawen, Li, Lun, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Mu, Qili, Ning, Changjun, Qi, Binbin, Ren, Jie, Ren, Zhizhou, Ruan, Xichao, Song, Zhaohui, Song, Yingpeng, Sun, Hong, Sun, Kang, Sun, Xiaoyang, Sun, Zhijia, Tang, Hongqing, Tang, Jingyu, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yi, Han, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Linhao, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yubin, Zhou, Luping, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2020
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29. Measurement of relative differential cross sections of the neutron-deuteron elastic scattering for neutron energy from 13 to 52 MeV

Author

Cui, Zengqi, Jiang, Haoyu, Jiang, Wei, Zhang, Guohui, Fan, Ruirui, Pang, Danyang, Sun, Kang, Bai, Huaiyong, Hu, Yiwei, Liu, Jie, Yi, Han, Ning, Changjun, Sun, Zhijia, Tang, Jingyu, An, Qi, Bao, Jie, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Yonghao, Chen, Yukai, Chen, Zhen, Feng, Changqing, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Zhijie, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Chao, Li, Jiawen, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Mu, Qili, Qi, Binbin, Ren, Jie, Ren, Zhizhou, Ruan, Xichao, Song, Zhaohui, Song, Yingpeng, Sun, Hong, Sun, Xiaoyang, Tan, Zhixin, Tang, Hongqing, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Linhao, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yubin, Zhou, Luping, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2021
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30. The 6LiF-silicon detector array developed for real-time neutron monitoring at white neutron beam at CSNS

Author

Li, Qiang, Luan, Guangyuan, Bao, Jie, Tang, Jingyu, Jing, Hantao, Fan, Ruirui, Bai, Huaiyong, Jiang, Wei, Ning, Changjun, Ren, Jie, Ruan, Xichao, Chen, Yonghao, Zhang, Guohui, Yi, Han, An, Qi, Cao, Ping, Chen, Qiping, Cheng, Pinjing, Cui, Zengqi, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Ma, Yinglin, Qi, Binbin, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2019
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32. Measurement of the neutron total cross sections of aluminum at the back-n white neutron source of CSNS

Author

Liu, Xingyan, Yang, Yiwei, Liu, Rong, Wen, Zhongwei, Wen, Jie, Han, Zijie, Chen, Yonghao, Jing, Hantao, Yi, Han, Bao, Jie, Ren, Zhizhou, An, Qi, Bai, Huaiyong, Cao, Ping, Chen, Qiping, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Li, Yang, Liu, Shubin, Luan, Guangyuan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2021
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33. AFS control system research of distributed drive electric vehicles by adaptive super-twisting sliding mode control.

Author

Chen, Qiping, Xiong, Zuqi, Hu, Yiming, Huang, Liang, Liu, Qin, and You, Daoliang

Subjects
*SLIDING mode control, *CHATTERING control (Control systems), *ELECTRIC vehicles, *STEERING gear, *MOTOR vehicle driving
Abstract

To solve the problems of serious buffeting in traditional sliding mode control and difficulty in obtaining the derivative information of the system sliding mode surface, a distributed drive electric vehicles active front steering (AFS) control method based on adaptive super-twisting sliding mode control (ASTSMC) is proposed. Taking the yaw rate deviation as the state quantity, the stable and convergent sliding mode surface is designed to obtain the equivalent control input of the front wheel angle. The sliding mode function information is substituted into the parameters of the super-twisting algorithm; the discontinuous term is kept in the integrand function to keep the control signal continuous and weaken the system chattering; the adaptive control law is added to design the AFS controller. The co-simulation results of Matlab/Simulink and Carsim show that ASTSMC can reduce the yaw rate by 40.59% compared with no control under step steering condition. Compared with the sliding mode controller, ASTSMC has optimized the sideslip angle by 5.41% under the double line shifting condition. [ABSTRACT FROM AUTHOR]

Published
2024
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35. Measurement of the relative differential cross sections of the 1H(n,el) reaction in the neutron energy range from 6 MeV to 52 MeV

Author

Jiang, Haoyu, Jiang, Wei, Cui, Zengqi, Zhang, Guohui, Fan, Ruirui, Sun, Kang, Bai, Huaiyong, Hu, Yiwei, Liu, Jie, Yi, Han, Ning, Changjun, Zhou, Liang, Sun, Zhijia, Tang, Jingyu, An, Qi, Bao, Jie, Bao, Yu, Cao, Ping, Chen, Haolei, Chen, Qiping, Chen, Yonghao, Chen, Yukai, Chen, Zhen, Feng, Changqing, Gao, Keqing, Gu, Minhao, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, Hong, Yang, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Zhijie, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Chao, Li, Jiawen, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Luan, Guangyuan, Mu, Qili, Qi, Binbin, Ren, Jie, Ren, Zhizhou, Ruan, Xichao, Song, Zhaohui, Song, Yingpeng, Sun, Hong, Sun, Xiaoyang, Tan, Zhixin, Tang, Hongqing, Tang, Xinyi, Tian, Binbin, Wang, Lijiao, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Zhaohui, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Linhao, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yubin, Zhou, Luping, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2021
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38. Neutron energy spectrum measurement of the Back-n white neutron source at CSNS

Author

Chen, Yonghao, Luan, Guangyuan, Bao, Jie, Jing, Hantao, Zhang, Liying, An, Qi, Bai, Huaiyong, Cao, Ping, Chen, Qiping, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jiang, Wei, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Ren, Jie, Ruan, Xichao, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yi, Han, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2019
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39. The C6D6 detector system on the Back-n beam line of CSNS

Author

Ren, Jie, Ruan, Xichao, Bao, Jie, Luan, Guangyuan, Jiang, Wei, An, Qi, Bai, Huaiyong, Cao, Ping, Chen, Qiping, Chen, Yonghao, Cheng, Pinjing, Cui, Zengqi, Fan, Ruirui, Feng, Changqing, Gu, Minhao, Guo, Fengqin, Han, Changcai, Han, Zijie, He, Guozhu, He, Yongcheng, He, Yuefeng, Huang, Hanxiong, Huang, Weiling, Huang, Xiru, Ji, Xiaolu, Ji, Xuyang, Jiang, Haoyu, Jing, Hantao, Kang, Ling, Kang, Mingtao, Li, Bo, Li, Lun, Li, Qiang, Li, Xiao, Li, Yang, Li, Yang, Liu, Rong, Liu, Shubin, Liu, Xingyan, Ma, Yinglin, Ning, Changjun, Qi, Binbin, Song, Zhaohui, Sun, Hong, Sun, Xiaoyang, Sun, Zhijia, Tan, Zhixin, Tang, Hongqing, Tang, Jingyu, Wang, Pengcheng, Wang, Qi, Wang, Taofeng, Wang, Yanfeng, Wang, Zhaohui, Wang, Zheng, Wen, Jie, Wen, Zhongwei, Wu, Qingbiao, Wu, Xiaoguang, Wu, Xuan, Xie, Likun, Yang, Yiwei, Yi, Han, Yu, Li, Yu, Tao, Yu, Yongji, Zhang, Guohui, Zhang, Jing, Zhang, Linhao, Zhang, Liying, Zhang, Qingmin, Zhang, Qiwei, Zhang, Xianpeng, Zhang, Yuliang, Zhang, Zhiyong, Zhao, Yingtan, Zhou, Liang, Zhou, Zuying, Zhu, Danyang, Zhu, Kejun, and Zhu, Peng

Published
2019
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40. Regenerative Braking Control Strategy Based on Pavement Recognition Controller for Electric Vehicle.

Author

Chen, Qiping, Lv, Zongyu, Xu, Wuhao, Shu, Qiang, Liu, Senhai, and Xu, Li

Subjects
REGENERATIVE braking, ELECTRIC controllers, ELECTRIC vehicles, PAVEMENTS, AUTOMOBILE brakes, BRAKE systems
Abstract

Regenerative braking is a key technology for electric vehicles to improve energy efficiency and extend driving range. Considering the impact of road surface adhesion coefficient in the regenerative braking process of vehicles is a meaningful but challenging problem. To effectively utilize the pavement adhesion coefficient and improve the brake energy recovery effect, a pavement observer‐based regenerative braking control strategy for pure electric vehicles is proposed. The control strategy can identify the pavement based on correction factor by analogy idea according to the real‐time state information of vehicles. The optimal braking force distribution coefficient under different pavements is obtained by Fmincon function based on interior point algorithm. The effectiveness of the control strategy is verified by Simulink/CarSim software cosimulation and road test. The results show that the braking time of the proposed regenerative braking control strategy is reduced by 8.2% and the average actual feedback braking torque is increased by 17.6% in dry asphalt conditions compared with the fixed proportional distribution control strategy. Under the premise of effectively ensuring the braking stability and safety of the vehicle, more energy generated during braking can be recovered. [ABSTRACT FROM AUTHOR]

Published
2023
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43. INVESTIGATION ON ELASTIC CONTACT DYNAMIC STRESS OF A DEEP-GROOVE BALL BEARING BASED ON EXPLICIT DYNAMICS

Author

TU WenBing, LUO Ya, WANG ChaoBing, ZHANG Long, and CHEN QiPing

Subjects
Deep-groove ball bearing, Finite element model, Dynamic stress, Explicit dynamics, Mechanical engineering and machinery, TJ1-1570, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

Rolling element bearing is an important kind of machine element widely used in mechanical industry,and its internal stress condition has great influence on its service life. Considering the characteristic of elastic nonlinear contact in rolling element bearing,taking deep-groove ball bearing 6304 as investigation object,a flexible finite element dynamic model for contact nonlinear dynamic problem of a deep-groove ball bearing was established. Based on explicit dynamic finite element method,a nonlinear contact dynamic simulation was made and the kinematics characteristic of deep-groove ball bearing and contact stress of inner ring,outer ring and rolling element were obtained. The regularity of dynamic stress varying in motion process was studied.The results show that the present explicit dynamics finite element method is very efficient and reliable in solving complicated rolling element bearing dynamics stress,and it will become a useful means for the further work on rolling element bearing carrying capacity and service life.

Published
2016
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44. Measurement of the neutron energy spectrum of Back-n #ES1 at CSNS

Author

Chen Yonghao, Luan Guangyuan, Bao Jie, Jing Hantao, An Qi, Bai Huaiyong, Cao Ping, Chen Qiping, Cheng Pinjing, Cui Zengqi, Fan Ruirui, Feng Changqing, Gu Minhao, Guo Fengqin, Han Changcai, Han Zijie, He Guozhu, He Yongcheng, He Yuefeng, Huang Hanxiong, Huang Weiling, Huang Xiru, Ji Xiaolu, Ji Xuyang, Jiang Haoyu, Jiang Wei, Kang Ling, Kang Mingtao, Li Bo, Li Lun, Li Qiang, Li Xiao, Li Yang(a), Li Yang(b), Liu Rong, Liu Shubin, Liu Xingyan, Ma Yinglin, Ning Changjun, Qi Binbin, Ren Jie, Ruan Xichao, Song Zhaohui, Sun Hong, Sun Xiaoyang, Sun Zhijia, Tan Zhixin, Tang Hongqing, Tang Jingyu, Wang Pengcheng, Wang Qi, Wang Taofeng, Wang Yanfeng, Wang Zhaohui, Wang Zheng, Wen Jie, Wen Zhongwei, Wu Qingbiao, Wu Xiaoguang, Wu Xuan, Xie Likun, Yang Yiwei, Yi Han, Yu Li, Yu Tao, Yu Yongji, Zhang Guohui, Zhang Jing, Zhang Linhao, Zhang Liying, Zhang Qingming, Zhang Qiwei, Zhang Xianpeng, Zhang Yuliang, Zhang Zhiyong, Zhao Yingtan, Zhou Liang, Zhou Zuying, Zhu Danyang, Zhu Kejun, and Zhu Peng

Subjects
Physics, QC1-999
Abstract

The China spallation neutron source (CSNS) was built and started running since 2018. It produces neutrons by impinging 1.6 GeV protons onto a tungsten target with 25 Hz repetition frequency. A beam line exploiting the back-streaming neutrons (Back-n) was built mainly for nuclear data measurement and started commissioning simultaneously with CSNS in 2018. There are two experimental endstations along the Back-n beam line: endstation 1 (#ES1) with a neutron flight path of about 55 m and endstation 2 (#ES2) with about 76 m. The neutron energy spectra of both #ES1 and #ES2 were measured since it is important for feasibility study and analysis. In this paper, the measurement of the neutron energy spectrum of Back-n #ES1 is reported. It is measured by a multi-layer fission chamber using the 235U samples as the neutron converters. The neutron energy spectrum from 0.1 eV to 30 MeV is obtained. The integral neutron flux (from 0.1 eV to 30 MeV) normalized to the proton beam power of 100 kW is 1.55×107 neutrons/cm2/s.

Published
2020
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45. Measurements of neutron-induced light-charged particle emission reactions

Author

Zhang Guohui, Bai Huaiyong, Jiang Haoyu, Cui Zengqi, Lu Yi, Hu Yiwei, Chen Jinxiang, Gledenov Yu. M., Sedysheva M. V., Khuukhenkhuu G., Fan Ruirui, Jiang Wei, Yi Han, Tang Jingyu, Liang Zhou, Ning Changjun, An Qi, Bao Jie, Bao Yu, Cao Ping, Chen Haolei, Chen Qiping, Chen Yonghao, Yukai Chen, Chen Zhen, Feng Changqing, Gao Keqing, Gu Minhao, Han Changcai, Han Zijie, He Guozhu, He Yongcheng, Yang Hong, Huang Hanxiong, Huang Weiling, Huang Xiru, Ji Xiaolu, Ji Xuyang, Zhijie Jiang, Jing Hantao, Kang Ling, Kang Mingtao, Li Bo, Li Chao, Li Jiawen, Lun Li, Li Qiang, Xiao Li, Li Yang, Liu Rong, Liu Shubin, Liu Xingyan, Luan Guangyuan, Mu Qili, Qi Binbin, Ren Jie, Ren Zhizhou, Ruan Xichao, Song Zhaohui, Song Yingpeng, Sun Hong, Sun Kang, Sun Xiaoyang, Sun Zhijia, Tan Zhixin, Tang Hongqing, Tang Xinyi, Tian Binbin, Wang Lijiao, Wang Pengcheng, Wang Qi, Wang Taofeng, Wang Zhaohui, Wen Jie, Wen Zhongwei, Wu Qingbiao, Wu Xiaoguang, Wu Xuan, Xie Likun, Yang Yiwei, Yu Li, Yu Tao, Yu Yongji, Zhang Linhao, Zhang Qiwei, Zhang Xianpeng, Zhang Yuliang, Zhang Zhiyong, Zhao Yubin, Zhou Luping, Zhou Zuying, Zhu Danyang, Zhu Kejun, and Zhu Peng

Subjects
Physics, QC1-999
Abstract

In the past two decades cooperating with Frank Laboratory of Neutron Physics (FLNP), Joint Institute for Nuclear Research (JINR) measurements of (n, α) reaction cross sections for 6Li, 10B, 25Mg, 39K, 40Ca, 54,56,57 Fe, 58Ni, 63Cu, 64,67 Zn, 95Mo, 143Nd and 147,149 Sm nuclei were performed in the MeV neutron energy region based on the 4.5 MV Van de Graaff accelerator at Peking University. In recent years, our measurements were extended in three aspects. Firstly, measurements were expanded from two-body reactions to three-body reactions such as 10B (n, t2 α). Secondly, the neutron energy region was extended from below 8 MeV to 8 - 11 MeV by using the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE), with which cross sections of 54,56 Fe(n, α)53,51Cr reactions were measured. Thirdly, based on the newly-built China Spallation Neutron Source (CSNS) Back-n WNS (White Neutron Source), differential and angle-integrated cross sections for 6Li(n, t) and 10B(n, α) reactions were measured in the neutron energy region from 1 eV to 3 MeV.

Published
2020
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46. Simulations of the measurement results of differential cross sections of n-p and n-d elastic scattering at CSNS Back-n WNS

Author

Cui Zengqi, Bai Huaiyong, Jiang Haoyu, Hu Yiwei, Zhang Guohui, Fan Ruirui, Jiang Wei, Yi Han, Tang Jingyu, An Qi, Bao Jie, Bao Yu, Cao Ping, Chen Haolei, Chen Qiping, Chen Yonghao, Chen Yukai, Chen Zhen, Feng Changqing, Gao Keqing, Gu Minhao, Han Changcai, Han Zijie, He Guozhu, He Yongcheng, Hong Yang, Huang Hanxiong, Huang Weiling, Huang Xiru, Ji Xiaolu, Ji Xuyang, Jiang Zhijie, Jing Hantao, Kang Ling, Kang Mingtao, Li O, Li Chao, Li Jiawen, Li Lun, Li Qiang, Li Xiao, Li Yang, Liu Rong, Liu Shubin, Liu Xingyan, Luan Guangyuan, Mu Qili, Ning Changjun, Qi Binbin, Ren Jie, Ren Zhizhou, Ruan XiChao, Song Zhaohui, Song Yingpeng, Sun Hong, Sun Kang, Sun Xiaoyang, Sun Zhijia, Tan Zhixin, Tang Hongqing, Tang Xinyi, Tian Binbin, Wang Lijiao, Wang Pengcheng, Wang Qi, Wang Taofeng, Wang Zhaohui, Wen Jie, Wen Zhongwei, Wu Qingbiao, Wu Xiaoguang, Wu Xuan, Xie Likun, Yang Yiwei, Yu Li, Yu Tao, Yu Yongji, Zhang Linhao, Zhang Qiwei, Zhang Xianpeng, Zhang Yuliang, Zhang Zhiyong, Zhao Yubin, Zhou Luping, Zhou Zuying, Zhu Danyang, Zhu Kejun, and Zhu Peng

Subjects
Physics, QC1-999
Abstract

Differential cross-section data for the n-p and n-d elastic scattering (1H(n, el), 2H(n, el)) are collected and analyzed from EXFOR library. For En > 20 MeV, the experimental results for both reactions are scarce with large uncertainties and discrepancies in general. For En ≤ 20 MeV, the experimental results lack systematicness, most of which were measured around En = 14 MeV even though the differential cross sections of n-p scattering in 1 keV ≤ En ≤ 20 MeV region are recommended as standard. Taking these facts into account, more accurate and systematic measurements are planned. The experiments will be conducted using ΔE-E detectors of the Light-charged Particle Detector Array (LPDA) system at China Spallation Neutron Source (CSNS) Back-n White Neutron Source (WNS), and simulations are carried out. Using polyethylene and deuterated polyethylene as samples, both n-p and n-d scattering reactions are simulated along with the neutron-induced 12C background reactions, and the 2-D spectra and the counting rates of the ΔE-E detectors are obtained. According to the simulations, the applicable neutron energy range and positions of the detectors are recommended, and the beam time for the event and background measurements is suggested.

Published
2020
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47. Clamping Force Control Strategy of Electro-Mechanical Brake System Using VUF-PID Controller.

Author

Chen, Qiping, Lv, Zongyu, Tong, Haiyang, and Xiong, Zuqi

Subjects
BRAKE systems, CLAMPS (Engineering), AUTOMOBILE brakes, ADAPTIVE fuzzy control
Abstract

Clamping force control is one of the key technologies in the algorithm design and implementation of electro-mechanical braking system, whose control effects directly affect the vehicle braking performance and safety performance. In order to improve the clamping force control performance of electro-mechanical braking (EMB) system, an EMB clamping force control method based on Variable universe adaptive fuzzy PID (VUF-PID) controller is proposed, and stretching factors are added to the fuzzy PID control. According to the operation of the controlled object, the fuzzy theory domain can be adjusted in real time to keep the system in the proper parameter value and improve the adaptive ability of the system. The response characteristics and effectiveness of clamping force under step braking condition, gear switching braking condition and sine braking condition are verified by simulation experiments using MATLAB/Simulink. The results show that the proposed VUF-PID control method has strong tracking characteristics and stability characteristics, and meet the braking requirements under different braking conditions. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Research on Torque Ripple Optimization of Permanent Magnet Synchronous Motor for Electric Vehicle Based on Modular Poles.

Author

Chen, Qiping, Xu, Zhihui, Hu, Yiming, Ding, Junling, and Xie, Yinfei

Subjects
*PERMANENT magnet motors, *PERMANENT magnets, *AIR gap flux, *MOTOR vehicles, *TORQUE, *MAGNETIC pole
Abstract

Abstract in order to study the torque ripple of permanent magnet synchronous motor for electric vehicle, the method of modular poles instead of single pole is adopted to reduce the torque ripple. The modular poles consist of three kinds of permanent magnets with different remanence and are arranged in a sinusoidal distribution. The pole arc length and position of each magnetic pole are calculated according to the cutting area of sinusoidal air gap flux density wave. By changing the cutting area of sinusoidal air gap flux density wave, the optimal pole arc coefficient of each permanent magnet was determined, and the magnet pole combination with the smallest torque ripple value is obtained. The results show that the sine degree of back electromotive force is improved obviously, the cogging torque is decreased greatly, and the motor with modular poles has obvious effect on torque ripple suppression. The torque of the motor with different kinds of magnetic pole combination is more stable than that of the motor with the same kind of magnetic pole combination. In this paper, the method of using modular poles instead of single pole to reduce torque ripple is of positive significance, which provides a reference for the subsequent performance optimization of electric vehicle motor. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Multi-Objective Optimization Strategy for Permanent Magnet Synchronous Motor Based on Combined Surrogate Model and Optimization Algorithm.

Author

Yu, Yinquan, Pan, Yue, Chen, Qiping, Hu, Yiming, Gao, Jian, Zhao, Zhao, Niu, Shuangxia, and Zhou, Shaowei

Subjects
PERMANENT magnet motors, MATHEMATICAL optimization, EVOLUTIONARY algorithms, LATIN hypercube sampling, TAGUCHI methods, FINITE element method
Abstract

When a permanent magnet synchronous motor (PMSM) is designed according to the traditional motor design theory, the performance of the motor is often challenging to achieve the desired goal, and further optimization of the motor design parameters is usually required. However, the motor is a strongly coupled, non-linear, multivariate complex system, and it is a challenge to optimize the motor by traditional optimization methods. It needs to rely on reliable surrogate models and optimization algorithms to improve the performance of the PMSM, which is one of the problematic aspects of motor optimization. Therefore, this paper proposes a strategy based on a combination of a high-precision combined surrogate model and the optimization method to optimize the stator and rotor structures of interior PMSM (IPMSM). First, the variables were classified into two layers with high and low sensitivity based on the comprehensive parameter sensitivity analysis. Then, Latin hypercube sampling (LHS) is used to obtain sample points for highly sensitive variables, and various methods are employed to construct surrogate models for variables. Each optimization target is based on the acquired sample points, from which the most accurate combined surrogate model is selected and combined with non-dominated ranking genetic algorithm-II (NSGA-II) to find the best. After optimizing the high-sensitivity variables, a new finite element model (FEM) is built, and the Taguchi method is used to optimize the low-sensitivity variables. Finally, finite element analysis (FEA) was adopted to compare the performance of the initial model and the optimized ones of the IPMSM. The results showed that the performance of the optimized motor is improved to prove the effectiveness and reliability of the proposed method. [ABSTRACT FROM AUTHOR]

Published
2023
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